Throw exception when trying to undo a castling move with no castle there.
Throw exception when trying to undo a castling move with no castle there.

gamedevforks/smr,smrealms/smr,gamedevforks/smr,Curufir/smr,smrealms/smr,gamedevforks/smr,smrealms/smrv2.0,hemberger/smr,Curufir/smr,tmaus/smr,smrealms/smrv2.0,hemberger/smr,smrealms/smrv2.0,gamedevforks/smr,smrealms/smr,Curufir/smr,smrealms/smrv2.0,hemberger/smr,hemberger/smr,tmaus/smr